BTW , if you're not using relay , is the full 55W being used by the bulb ? I mean is stock wiring capable of supplying 55 W to the bulb ? A side by side comparo with a bike which has relay might put the doubt to rest .
Sir , it's true I have not posted a full review post the 235 upgrade , but most of the observations have been posted at one time or another .
I'm not into drag so can't say about 'off the block' effect .
The power has increased , but it's more obvious in the higher rpm range . Post 4k rpm it starts pushing out power in a linear manner and the surge is addictive - I ride above 4k rpm most of the time in 3rd,4th and 5th gear .
Would you say my engine efficiency has increased? "Cause I'm not getting the 'rpm X .015' thing correct - at 4k rpm the bike speedo will be showing @ 67 kmph . Earlier there was only a slight difference in the ratio , now it's way off mark .
Mileage is what's confusing me . I think my fuel tap has clogged since my observations show I'm getting @ 30 kmpl for some fillings and 38 for others . My last petrol filling was 28 km ago . I filled in 50/- worth of petrol which was 720 ml ( normally I fill 2.88L for 200/- or 1.44 for 100/- . Changed to 50/- filling to check the mileage ) So now I'm getting 38 kmpl and running .. Since my riding is in RAYP mode , that's not an accurate indicator . I'm just not willing to sacrifice my pleasure of riding for economy . Anyway the mileage is not lesser than what I had before the upgrade .
One aspect I've noticed is the vibes are more (slightly more) pronounced than before . It isn't disturbing or anything , but it is there . It feels more like a beast about to pounce now .
All in all , I'm pretty satisfied . Actually I didn't do it to out run others ., In a mallu film there's a dialogue "sadhanam kayyilundu" meaning I have it . The thought 'if it can be done , then why not' is what took me to up-size .
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Sorry to hear about the incident. Hope you are o.k. Just a thought . cbz c.g may fix ..Last month I had asked at Focuz auto. and they quoted 650/- ph. no. 0484-2337988 just check whether they are in kannur.

Sorry to know that you met with a Accident, and hope no serious injury to you.

Thanks for the update....and happy to see that you are enjoying the new power and zipping around...
The piston top height and compatibility is always measured from the Gudgeon pin opening to the crown(top).If this height is equal ,between the two pistons,you do not have to add thick Gaskets...You had only changed the piston, so the ratio of 15kms per 1,000 RPM stays at the 5 th gear...if you are getting erroneous reading then check your battery and speedo connection and earthing...
The job done looks good indeed and hope you have an enjoyable experience.
Good Luck.

I've read that in the P220 we can increase displacement by offsetting the big end by 3mm, which will increase the stroke by 6mm so 67mmx68.4mm = 241cc.
But my query is, then wont the piston be at a lower position at TDC comparing stock? And wont that lower the compression???

I thought I was the worst living being in Maths and calculations...You seem to be a competitor to me..
If you increase the stroke length from stock it means at BTDC the Piston will be Lower than stock and at TDC ,Piston will be higher than stock....so at TDC it will hit the HEAD & VALVES.
With increased stroke length the Compression will increase..

I've tried contacting the guy who posted the info in the first place but didnt get a response, so asked a guy on FB running a P180 with 76mm piston. And this was his reply,

"Is it possible to move the big end?

very possible I've done it with my current bike from 56.4 to 62.4

Whats the procedure?

plan to do it also for my next project using P220 from 62 to 68
the impact is you'll get more torque

I mean how to move it?

0203 HRDP 01 Z STROK Photo 1
0203 HRDP 01 Z STROK
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I get that
so how to move the big end? I mean which direction.

moving the connecting road to the outer part of the crank
or you can change the connecting road which has longer rod

sorry connecting rod"

WOW !!!!! moved big end from 56.4 to 62.4 ?????
and use a Longer con rod to get longer stroke ??????

I learn NEW ,NEW, basics from you ASHWIN.....Keep it up.

Ashwin,read the article that showed the pic . It can be done as they say, but I doubt it can be done in zma . Also , I think it can be done in P150/180/200 ..lengthening conrod to get more stroke..???don't think so.

Hello friends has anyone here changed their handle bars to a lower height one or to clip on, if so please share the picture and experience thanks.

Dont blame me, I just posted to clarify if its possible on the ZMA.

And sir, please re read
-56.4 or 56.4 to 62.4 means 6mm difference in stroke meaning 3mm shift in big end.

-Who said anything about longer conrod giving longer stroke??? AFAIK isnt it the other way around.

Which article?? All I see is a pic when I click that link. :O

Edit-
Sorry guys, I noticed the article only now. I thought that he just sent me an image.

Hello friends has anyone here changed their handle bars to a lower height one or to clip on, if so please share the picture and experience thanks.